There is a wealth of research on impact force characteristics when landing from a jump. However, there are no data on impact forces during landing from a jump with an airborne rotation about the vertical axis. We examined impact force parameters in the vertical and horizontal axes during vertical jump (VJ) landings and vertical jump landings with a 180-degree rotation (VJR). Twenty-four Division 1 male soccer players performed three VJ and VJR landings on a dual-force platform system. Paired-samples t-tests (α=0.05) compared differences in the first (F1) and second (F2) peak vertical ground reaction forces, times to F1 (tF1), F2 (tF2), and the end of the impact phase, vertical impulse, and anterior-posterior and medial-lateral force couples. Effect sizes (ES; large >0.8) were computed to determine the magnitude of the differences. Lower jump height (41.60±4.03 cm, VJ landings; 39.40±4.05 cm, VJR landings; p=0.002; ES=0.39), greater F2 (55.71±11.95 N•kg-1, VJ; 68.16±14.82 N•kg-1; p<0.001; ES=0.94), faster tF2 (0.057±0.012 sec, VJ; 0.047±0.011 sec, VJR; p=0.001; ES=0.89), greater anterior-posterior (0.06±0.03 N•s•kg-1, VJ; 0.56±0.15 N•s•kg-1, VJR; p<0.001; ES=1.83) and medial-lateral force couples (0.29±0.11 N•s•kg-1, VJ; 0.56±0.14 N•s•kg-1, VJR; p<0.001; ES=1.46) occurred during VJR landings. No other differences were identified. This kinetic analysis determined that landing from a jump with 180-degree airborne rotation is different than landing from a jump without an airborne rotation. Male Division 1 soccer players could benefit from increasing the volume of VJR landings during training to address the differences in jump height and force parameters compared to VJ landings.
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 July 2017.
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